I predict millions of downloads for this addon Rated 5 out of 5 stars
This addon has only 29 users up until now (December 19) which is incredible. Maybe you don't know about important tabs and non-important tabs. Important tabs are the weekly schedule, 'faces' of new colleagues, quarterly results, the canteen time table. Non-important tabs are porn.
With the addon 'Important Tabs' you can close your non-important tabs with one mouse-click. Highly recommended!